Modify and truncate DAF files

[ChristopherRabotin]

Summary

• Provides the ability to truncate segments or remove segments from any DAF file, available via API and CLI
• Provides the ability, via the API only, to rename segments in DAF files

Architectural Changes

Most of the DAF functionality has been moved to a GenericDAF<W>, where W is either Bytes or BytesMut (of course, only the latter enables modification of the underlying bytes).

New Features

• Truncate existing DAF segments
• Remove existing DAF segments
• Rename DAF segments (modifying the name record)

Improvements

No change

Bug Fixes

No change

Testing and validation

1. Renaming test renames a segment, saves the new DAF/SPK, reloads it, and ensures that the name was changed
2. Modification test truncates a segment that isn't at the start of the file, saves it, and reloads it, checking that the start time was modified and the end time was not modified. A manual test was also done here via the CLI for both the truncation and inspection of the changes
3. Modification test includes removing the Moon (301) from the DE440s.bsp file, and checks that after saving, that entry is indeed removed.

Documentation

This PR does not primarily deal with documentation changes.

[ChristopherRabotin]

Reviewed, looks ok, could use a clean up of the io_imports in mut_daf (that macro isn't needed but it doesn't hurt per se).